Reflecting vs Refracting
... For a given cleanliness class (Xc), the quantity N(D) describes the total number of particles of diameter (D) and larger. The minimum diameter of particle in the 1246C standard is defined at 1µm, and the largest diameter is equal to the cleanliness class in µm (in a Xc=200 distribution, the largest ...
... For a given cleanliness class (Xc), the quantity N(D) describes the total number of particles of diameter (D) and larger. The minimum diameter of particle in the 1246C standard is defined at 1µm, and the largest diameter is equal to the cleanliness class in µm (in a Xc=200 distribution, the largest ...
An Overview of Wide-Field-Of-View
... diameter of the largest correcting lens make development of the Hyper Suprime Camera an unprecedented effort. k) The LSST will feature an 8.4 meter aperture Paul optical system including a 3lens corrector [12]. The telescope will image a field 3.5 degrees in diameter onto a flat focal surface at a f ...
... diameter of the largest correcting lens make development of the Hyper Suprime Camera an unprecedented effort. k) The LSST will feature an 8.4 meter aperture Paul optical system including a 3lens corrector [12]. The telescope will image a field 3.5 degrees in diameter onto a flat focal surface at a f ...
Alignment of the 1.6 meter off-axis New Solar Telescope at Big Bear
... Telescope (NST) at the Big Bear Solar Observatory. The NST will be the largest aperture solar telescope in the world until the 4 m Advanced Technology Solar Telescope (ATST) and 4 m European Solar Telescope (EST) begin operation in the next decade. Meanwhile, the NST will be the largest off-axis tele ...
... Telescope (NST) at the Big Bear Solar Observatory. The NST will be the largest aperture solar telescope in the world until the 4 m Advanced Technology Solar Telescope (ATST) and 4 m European Solar Telescope (EST) begin operation in the next decade. Meanwhile, the NST will be the largest off-axis tele ...
Sodium D-line Splitting
... 10. Look through the telescope to notice the first or second order (whichever you see is completely resolved) D lines of sodium. That means you will see two yellow ...
... 10. Look through the telescope to notice the first or second order (whichever you see is completely resolved) D lines of sodium. That means you will see two yellow ...
Observing Double Stars
... Double star measurements were first made at Cuesta College on California’s central coast in the Fall of 2007 (Grisham et al. 2008, Johnson and Genet 2007, and Johnson et al. 2008). The following year the seminar was moved to Cuesta College’s South Campus at Arroyo Grande High School (AGHS), which ha ...
... Double star measurements were first made at Cuesta College on California’s central coast in the Fall of 2007 (Grisham et al. 2008, Johnson and Genet 2007, and Johnson et al. 2008). The following year the seminar was moved to Cuesta College’s South Campus at Arroyo Grande High School (AGHS), which ha ...
User`s Manual for the 84cm and 1.5m Telescopes
... The 1.5m telescope is a Ritchey-Chrétien with an 1.5m primary mirror. It delivers a roughly f/13.5 beam to a Cassegrain focus. The edge of the primary is out of figure, and so the telescope is stopped down at the secondary to about 1.32m. The telescope often suffers from significant astigmatism. The ...
... The 1.5m telescope is a Ritchey-Chrétien with an 1.5m primary mirror. It delivers a roughly f/13.5 beam to a Cassegrain focus. The edge of the primary is out of figure, and so the telescope is stopped down at the secondary to about 1.32m. The telescope often suffers from significant astigmatism. The ...
PACS Calibration Status and Plans
... 4) flat-field assessment - bright compact secondary calibrators and spectral PSF standards 5) reproducibility - primary & secondary calibrators 6) system stability - telescope background ...
... 4) flat-field assessment - bright compact secondary calibrators and spectral PSF standards 5) reproducibility - primary & secondary calibrators 6) system stability - telescope background ...
James Webb Space Telescope – A Bigger and Better
... galaxy becomes stretched during its long travel to Earth. The amount by which the received wavelength is stretched is determined by how much the Universe expanded in the time since the light was emitted. ...
... galaxy becomes stretched during its long travel to Earth. The amount by which the received wavelength is stretched is determined by how much the Universe expanded in the time since the light was emitted. ...
the eye of the beholder: designing the owl
... plausible fabrication technologies were introduced. Since then, the field of Extremely Large Telescopes has rapidly expanded, with concepts of 20- to 100-m telescopes being promoted worldwide. We identify three factors that support such unprecedented increase in telescope diameter: optical segmentat ...
... plausible fabrication technologies were introduced. Since then, the field of Extremely Large Telescopes has rapidly expanded, with concepts of 20- to 100-m telescopes being promoted worldwide. We identify three factors that support such unprecedented increase in telescope diameter: optical segmentat ...
Powerpoint file as used in presentation
... Tolerant of wavefront and photometric fluctuations Tolerant of different (possibly small) visibilities on some baselines Possibility of combining AT (1.8 meter telescope) with UT (8 meter ...
... Tolerant of wavefront and photometric fluctuations Tolerant of different (possibly small) visibilities on some baselines Possibility of combining AT (1.8 meter telescope) with UT (8 meter ...
6671-09_stacie_hvisc - LOFT, Large Optics Fabrication and
... of the two values to the structure function If the second point is not in the pupil, then ignore it ...
... of the two values to the structure function If the second point is not in the pupil, then ignore it ...
Pre-flight integration and characterization of the SPIDER balloon
... southern hemisphere. By observing at multiple frequencies with similar signal-to-noise, Spider will also be able to characterize the foreground contribution to the B-mode signal. Figure 2 shows the expected dust contribution to the Bmode power at 94 and 150 GHz in the Spider observing region, based ...
... southern hemisphere. By observing at multiple frequencies with similar signal-to-noise, Spider will also be able to characterize the foreground contribution to the B-mode signal. Figure 2 shows the expected dust contribution to the Bmode power at 94 and 150 GHz in the Spider observing region, based ...
Optics requirements for the Generation-X x
... There are approaches to controlling those errors. ...
... There are approaches to controlling those errors. ...
Custom Solutions Catalog
... The Large Black frame features spring-hinged temples while the Small Black frame includes a gold metal accent around the side shields for additional style. The protection on both styles comes from shields on the top and bottom of the lens as well as from a custom made side shield. Although providing ...
... The Large Black frame features spring-hinged temples while the Small Black frame includes a gold metal accent around the side shields for additional style. The protection on both styles comes from shields on the top and bottom of the lens as well as from a custom made side shield. Although providing ...
Adaptive Optics for High-Contrast Imaging
... exoplanet orbiting in front of it as seen from Earth. The transit method even offers the possibility to obtain spectral information from the Exoplanet via secondary transits or transmission spectroscopy. While secondary transits overcome the brightness ratio between star and planet by observing clos ...
... exoplanet orbiting in front of it as seen from Earth. The transit method even offers the possibility to obtain spectral information from the Exoplanet via secondary transits or transmission spectroscopy. While secondary transits overcome the brightness ratio between star and planet by observing clos ...
The Large Binocular Telescope`s ARGOS ground
... the three beams to be adjusted independently. Diverger lenses expand the beams to an exit pupil of 8 mm diameter on a fold flat that sends the light vertically up into the launch projector. This fold flat is mounted on a fast tip-tilt stage that serves to compensate jitter in the outgoing beam. The ...
... the three beams to be adjusted independently. Diverger lenses expand the beams to an exit pupil of 8 mm diameter on a fold flat that sends the light vertically up into the launch projector. This fold flat is mounted on a fast tip-tilt stage that serves to compensate jitter in the outgoing beam. The ...
Adaptive Optics: An Introduction
... Turbulence in the Earth's atmosphere is caused by many physical phenomena. The atmospheric boundary layer is the part of the atmosphere closest to the ground, whose state and wind speeds are influenced directly by the presence of the Earth's surface. The boundary layer is almost continuously turbule ...
... Turbulence in the Earth's atmosphere is caused by many physical phenomena. The atmospheric boundary layer is the part of the atmosphere closest to the ground, whose state and wind speeds are influenced directly by the presence of the Earth's surface. The boundary layer is almost continuously turbule ...
PowerSeeker 80 EQ Manual
... If you wear corrective lenses (specifically glasses), you may want to remove them when observing with an eyepiece attached to the telescope. However, when using a camera you should always wear corrective lenses to ensure the sharpest possible focus. If you have astigmatism, corrective lenses must be ...
... If you wear corrective lenses (specifically glasses), you may want to remove them when observing with an eyepiece attached to the telescope. However, when using a camera you should always wear corrective lenses to ensure the sharpest possible focus. If you have astigmatism, corrective lenses must be ...
60AZ-AR - OPT Telescopes
... spiral (like our galaxy, the Milky Way) and other galaxies look more like a large football and are called elliptical galaxies. There are many galaxies that are irregularly shaped and are thought to have been pulled apart because they passed too close to—or even through—a larger galaxy. You may be ab ...
... spiral (like our galaxy, the Milky Way) and other galaxies look more like a large football and are called elliptical galaxies. There are many galaxies that are irregularly shaped and are thought to have been pulled apart because they passed too close to—or even through—a larger galaxy. You may be ab ...
Your Presentation Title
... – Tracking fails - you cant even attempt to measure anything! – The only ways to track the atmospheric fluctuations on a long baseline (V<<1) are to: • Decompose the baseline into lots of shorter ones and track on each simultaneously. This is called “baseline bootstrapping”. • Monitor the atmosphere ...
... – Tracking fails - you cant even attempt to measure anything! – The only ways to track the atmospheric fluctuations on a long baseline (V<<1) are to: • Decompose the baseline into lots of shorter ones and track on each simultaneously. This is called “baseline bootstrapping”. • Monitor the atmosphere ...
Paper
... As the world-wide utilization of space increases, SSA will grow in importance. With this growth, interest in SOI will increase as well. It is believed that an affordable and practical spectroscopic system for SOI will be of interest to the global space community. Such a system would need to be repli ...
... As the world-wide utilization of space increases, SSA will grow in importance. With this growth, interest in SOI will increase as well. It is believed that an affordable and practical spectroscopic system for SOI will be of interest to the global space community. Such a system would need to be repli ...
RADIO POLARIZATION OF THE YOUNG HIGH–MAGNETIC
... 2496 MHz with the Australia Telescope Compact Array, we have determined a rotation measure for the pulsar of +842 23 rad m2 . These data, combined with archival polarimetry data taken at a center frequency of 1366 MHz with the Parkes telescope, were used to determine the polarization characterist ...
... 2496 MHz with the Australia Telescope Compact Array, we have determined a rotation measure for the pulsar of +842 23 rad m2 . These data, combined with archival polarimetry data taken at a center frequency of 1366 MHz with the Parkes telescope, were used to determine the polarization characterist ...
Do It Yourself Telescopes
... On the celestial sphere, astronomers use lines similar to those of latitude and longitude on the Earth. The astronomical equivalent of latitude is declination, measured in degrees (°) of arc, positive for north and negative for south. Each degree is divided into sixty minutes ('), and each minute is ...
... On the celestial sphere, astronomers use lines similar to those of latitude and longitude on the Earth. The astronomical equivalent of latitude is declination, measured in degrees (°) of arc, positive for north and negative for south. Each degree is divided into sixty minutes ('), and each minute is ...
FIRSTSCOPE 60 - MODELS #21055 and #21055-DX
... focal lengths up to 1000mm and still enjoy a telescope that is relatively compact and portable. A Newtonian Reflector telescope offers such impressive light-gathering characteristics you can take a serious interest in deep space astronomy even on a modest budget. Newtonian Reflector telescopes do r ...
... focal lengths up to 1000mm and still enjoy a telescope that is relatively compact and portable. A Newtonian Reflector telescope offers such impressive light-gathering characteristics you can take a serious interest in deep space astronomy even on a modest budget. Newtonian Reflector telescopes do r ...
Allen Telescope Array
The Allen Telescope Array (ATA), formerly known as the One Hectare Telescope (1hT) is a radio telescope array dedicated to astronomical observations and a simultaneous Search for Extraterrestrial Intelligence (SETI). The array is situated at the Hat Creek Radio Observatory, 290 miles (470 km) northeast of San Francisco, California.Originally developed as a joint effort between the SETI Institute and the Radio Astronomy Laboratory (RAL) at the University of California, Berkeley (UC Berkley) with funds obtained from an initial US$11.5 million donation by the Paul G. Allen Family Foundation, the project completed the first phase of construction and become operational on 11 October 2007 with 42 antennas (ATA-42), after Paul Allen (co-founder of Microsoft) pledged an additional $13.5 million to support the construction of the first and second phases.Though overall Allen has contributed more than $30 million to the project, the project has not succeeded in building the 350 six metre (19.7 feet) dishes originally conceived, and suffered an operational hiatus due to funding shortfalls between April and August 2011. Subsequently, UC Berkeley exited the project, completing divestment in April 2012. The facility is now managed by SRI International (formerly Stanford Research Institute), an independent, nonprofit research institute.In August 2014 the installation was threatened by a forest fire in the area and was briefly forced to shut down, but ultimately emerged largely unscathed.